Delaware Tap Water Quality

EPA water quality data for 150 community water systems serving 1,007,637+ people in Delaware. Click any system to see violations, lead testing results, and a safety grade.

Delaware is one of the few states where groundwater supplies the majority of drinking water, with the Columbia and Potomac aquifers serving most of the population. Nitrate contamination from poultry farming and agriculture affects many wells on the Delmarva Peninsula. PFAS contamination near Dover Air Force Base has required treatment upgrades.

ARTESIAN WATER COMPANY NEWARK, DE · 231,114 people · Surface Water Purchased WILMINGTON WATER DEPARTMENT WILMINGTON, DE · 107,976 people · Surface Water VEOLIA WATER DELAWARE, INC WILMINGTON, DE · 100,495 people · Surface Water REHOBOTH PUMP DISTRICT (TUI) DOVER, DE · 81,417 people · Groundwater BETHANY BAY PUMP DISTRICT DOVER, DE · 51,000 people · Groundwater NEWARK WATER DEPARTMENT NEWARK, DE · 40,000 people · Surface Water DOVER WATER DEPARTMENT DOVER, DE · 39,491 people · Groundwater DEWEY BEACH WATER DEPARTMENT FRANKFORD, DE · 31,000 people · Groundwater Purchased REHOBOTH BEACH WATER DEPARTMENT REHOBOTH BEACH, DE · 25,000 people · Groundwater ARTESIAN SOUTHERN SUSSEX REGIONAL NEWARK, DE · 18,215 people · Groundwater MIDDLETOWN WATER DEPARTMENT MIDDLETOWN, DE · 17,700 people · Surface Water Purchased CAMDEN PUMP DISTRICT DOVER, DE · 17,208 people · Groundwater GARRISON LAKE PUMP DISTRICT DOVER, DE · 17,148 people · Groundwater SUSSEX SHORES WATER COMPANY BETHANY BEACH, DE · 12,450 people · Groundwater BETHANY BEACH WATER DEPARTMENT BETHANY BEACH, DE · 12,000 people · Groundwater SMYRNA WATER DEPARTMENT SMYRNA, DE · 11,813 people · Groundwater DOVER AIR FORCE BASE DOVER, DE · 11,000 people · Groundwater LONG NECK WATER COMPANY LONG NECK, DE · 11,000 people · Groundwater MILFORD WATER DEPARTMENT MILFORD, DE · 9,800 people · Groundwater CHURCH CREEK (AWC) NEWARK, DE · 9,654 people · Groundwater LEWES BOARD OF PUBLIC WORKS LEWES, DE · 9,627 people · Groundwater MILLSBORO WATER DEPARTMENT MILLSBORO, DE · 8,568 people · Groundwater GEORGETOWN WATER DEPARTMENT GEORGETOWN, DE · 7,259 people · Groundwater ARTESIAN NORTHERN KENT REGIONAL NEWARK, DE · 7,014 people · Groundwater SEAFORD WATER DEPARTMENT SEAFORD, DE · 6,699 people · Groundwater BRIDGEVILLE WATER DEPARTMENT BRIDGEVILLE, DE · 6,000 people · Groundwater MUNICIPAL SERVICES COMMISSION NEW CASTLE, DE · 5,549 people · Groundwater EAST NCC DISTRICT DOVER, DE · 5,538 people · Groundwater ARTESIAN NORTHERN SUSSEX REGIONAL NEWARK, DE · 5,511 people · Groundwater CAMDEN WYOMING SEWER AND WATER AUTHORITY CAMDEN, DE · 5,000 people · Groundwater NORTH WEST PUMP DISTRICT DOVER, DE · 4,149 people · Groundwater LAUREL WATER DEPARTMENT LAUREL, DE · 3,984 people · Groundwater HARRINGTON WATER DEPARTMENT HARRINGTON, DE · 3,562 people · Groundwater SELBYVILLE WATER DEPARTMENT SELBYVILLE, DE · 3,502 people · Groundwater MILTON WATER DEPARTMENT MILTON, DE · 3,200 people · Groundwater BROADKILN BEACH WATER COMPANY (TUI) DOVER, DE · 3,171 people · Groundwater WILLOW GROVE MILL MIDDLETOWN, DE · 3,090 people · Groundwater Purchased DELAWARE CITY WATER DEPARTMENT (AWC) NEWARK, DE · 2,610 people · Groundwater DELMAR UTILITY COMM (TN OF DELMAR) DELMAR, DE · 2,027 people · Groundwater DELAWARE CORRECTIONAL CENTER NEWARK, DE · 2,000 people · Groundwater SWANN KEYS SALISBURY, MD · 1,764 people · Groundwater FELTON WATER DEPARTMENT FELTON, DE · 1,591 people · Groundwater REHOBOTH BAY COMMUNITY REHOBOTH BEACH, DE · 1,575 people · Groundwater BRIDGEVILLE PUMP DISTRICT DOVER, DE · 1,542 people · Groundwater BURTONWOOD NEWARK, DE · 1,503 people · Groundwater MALLARD LAKES SELBYVILLE, DE · 1,500 people · Groundwater PARKSIDE MIDDLETOWN, DE · 1,467 people · Groundwater Purchased ANGOLA BEACH ESTATES LEWES, DE · 1,400 people · Groundwater PINEWOOD ACRES DOVER, DE · 1,200 people · Groundwater BLADES, TOWN OF BLADES, DE · 1,200 people · Groundwater WILD QUAIL PUMP DISTRICT DOVER, DE · 1,017 people · Groundwater GREENWOOD WATER DEPARTMENT GREENWOOD, DE · 973 people · Groundwater FREDERICA WATER DEPARTMENT FREDERICA, DE · 950 people · Groundwater SOUTH EAST PUMP DISTRICT DOVER, DE · 936 people · Groundwater LAUREL VILLAGE MHC LAUREL, DE · 918 people · Groundwater DOVE RUN MIDDLETOWN, DE · 909 people · Groundwater Purchased BAYWOOD GREENS LONG NECK, DE · 909 people · Groundwater Purchased FREDERICA PUMP DISTRICT DOVER, DE · 861 people · Groundwater VILLAGEBROOK BEAR, DE · 847 people · Groundwater Purchased SLAUGHTER BEACH PWS NEWARK, DE · 846 people · Groundwater HOLLY HILL ESTATES SMYRNA, DE · 831 people · Groundwater CLEARBROOKE ESTATES PUMP DISTRICT DOVER, DE · 768 people · Groundwater STOCKLEY CENTER NEWARK, DE · 749 people · Groundwater WINTERTHUR WINTERTHUR, DE · 687 people · Groundwater HUNTERS RUN BEAR, DE · 683 people · Groundwater Purchased SEAGLASS AT REHOBOTH BEACH REHOBOTH BEACH, DE · 674 people · Groundwater Purchased HOME TOWN VILLAGE OF COOL BRANCH SEAFORD, DE · 654 people · Groundwater GRANTS WAY PUMP DISTRICT (TUI) DOVER, DE · 639 people · Groundwater CEDAR VILLAGE LLC REHOBOTH BEACH, DE · 600 people · Groundwater CAPE WINDSOR COMMUNITY ASSOCIATION INC SELBYVILLE, DE · 600 people · Groundwater SOUTHWOOD ACRES PUMP DISTRICT DOVER, DE · 591 people · Groundwater BRIDGEVILLE MALL (TUI) DOVER, DE · 550 people · Groundwater TALL PINES RESORT COMMUNITY SYS1 LEWES, DE · 538 people · Groundwater BAYSHORE MOBILE HOME PARK OCEAN VIEW, DE · 533 people · Groundwater HENLOPEN ACRES, TOWN OF REHOBOTH, DE · 522 people · Groundwater FOX POINTE SUBDIVISION SMYRNA, DE · 500 people · Groundwater INGRAM VILLAGE (AWC) NEWARK, DE · 498 people · Groundwater BARKERS LANDING MAGNOLIA, DE · 498 people · Groundwater Purchased MOBILE GARDENS I PITTSFORD, NY · 476 people · Groundwater CANTERBURY CROSSING PUMP DISTRICT DOVER, DE · 471 people · Groundwater LAKELAND/BEECHWOOD PUMP DISTRICT DOVER, DE · 459 people · Groundwater Purchased HUNTER MILL ESTATES PUMP DISTRICT DOVER, DE · 432 people · Groundwater COUNTRY GROVE DOVER, DE · 426 people · Groundwater MAGNOLIA WATER DEPARTMENT MAGNOLIA, DE · 425 people · Groundwater PEPPER CREEK DISTRICT (TUI) DOVER, DE · 414 people · Groundwater SOUTH SHORES (TUI) DOVER, DE · 402 people · Groundwater SILVER VIEW FARM REHOBOTH, DE · 398 people · Groundwater SAND HILL ACRES LAUREL, DE · 384 people · Groundwater KINGSMILL BEAR, DE · 381 people · Groundwater Purchased FRIENDSHIP CREEK NEWARK, DE · 366 people · Groundwater Purchased ST ANDREWS APARTMENTS BEAR, DE · 360 people · Groundwater Purchased CEDAR LANDING NEWARK, DE · 357 people · Groundwater GREATER ELLENDALE WATER DISTRICT FRANKFORD, DE · 350 people · Groundwater Purchased LONG NECK VILLAGE MILLSBORO, DE · 345 people · Groundwater SHAWNS HIDEAWAY SYSTEM #1 MILLSBORO, DE · 341 people · Groundwater ASCOT LANDING SUBDIVISION BEAR, DE · 338 people · Groundwater Purchased THE VINES OF SANDHILL (AWC) NEWARK, DE · 336 people · Groundwater FOREST GROVE PUMP DISTRICT DOVER, DE · 330 people · Groundwater NEW MARKET VILLAGE LAUREL, DE · 321 people · Groundwater CAREY ESTATES, LLC REHOBOTH BEACH, DE · 312 people · Groundwater AVALON WOODS OWNERS ASSOC INC GEORGETOWN, DE · 306 people · Groundwater KITTS HUMMOCK IMPROVEMENT ASSOC DOVER, DE · 305 people · Groundwater INDIAN RIVER ACRES PUMP DISTRICT DOVER, DE · 300 people · Groundwater SCOTTSDALE MOBILE HOME PARK PITTSFORD, NY · 300 people · Groundwater COUNTY SEAT GARDENS GEORGETOWN, DE · 297 people · Groundwater BRIARWOOD MANOR MHP PITTSFORD, NY · 296 people · Groundwater SYCAMORE CHASE (AWC) NEWARK, DE · 291 people · Groundwater Purchased ST ANDREWS APARTMENT NEW ADDITION BEAR, DE · 272 people · Groundwater Purchased POINT FARM DOVER, DE · 270 people · Groundwater HUNTERS POINTE PUMP DISTRICT DOVER, DE · 261 people · Groundwater EVERGREEN POST ACUTE SMYRNA, DE · 256 people · Groundwater COUNTRY LIVING MOBILE COURT MILLSBORO, DE · 255 people · Groundwater VOSHELLS COVE PUMP DISTRICT DOVER, DE · 252 people · Groundwater DOVER AIR PARK DOVER, DE · 252 people · Groundwater COOPER FARM PUMP DISTRICT DOVER, DE · 249 people · Groundwater SANDY RIDGE PUMP DISTRICT DOVER, DE · 243 people · Groundwater GLASGOW PINES II BEAR, DE · 235 people · Groundwater Purchased HOMESTEAD PARK PITTSFORD, NY · 230 people · Groundwater ENCHANTED ACRES MHC LLC CROFTON, MD · 225 people · Groundwater PINE RIDGE MOBILE HOME PARK SEAFORD, DE · 222 people · Groundwater MERIDIAN CROSSING APARTMENTS BEAR, DE · 220 people · Groundwater Purchased PONDS OF ODESSA (AWC) NEWARK, DE · 216 people · Groundwater BAYVIEW IMPROVEMENT COMPANY (AWC) NEWARK, DE · 214 people · Groundwater GREEN ACRES PUMP DISTRICT DOVER, DE · 213 people · Groundwater HOLLY OAK MOBILE HOME PARK DELMAR, MD · 210 people · Groundwater LOVE CREEK MHC LAUREL, DE · 210 people · Groundwater CROSSWINDS MHP, LLC WILLOW STREET, PA · 210 people · Groundwater PEPPER RIDGE PARK SELBYVILLE, DE · 209 people · Groundwater Purchased HOLLY VIEW MOBILE HOME PARK PITTSFORD, NY · 207 people · Groundwater FREDERICK LODGE PUMP DISTRICT DOVER, DE · 204 people · Groundwater MEADOWS AT CUBBAGE POND DOVER, DE · 201 people · Groundwater SUSSEX MANOR MOBILE HOME PARK SOUTHFIELD, MI · 195 people · Groundwater DRAWYERS CREEK PUMP DISTRICT DOVER, DE · 192 people · Groundwater COUNTRY CLUB VILLAGE (TUI) DOVER, DE · 192 people · Groundwater TODDS MOBILE COURT SEAFORD, DE · 189 people · Groundwater SUMMIT POND PUMP DISTRICT DOVER, DE · 177 people · Groundwater WOODLANDS OF MILLSBORO PUMP DISTRICT DOVER, DE · 171 people · Groundwater MISTY PINES PUMP DISTRICT DOVER, DE · 168 people · Groundwater COLONIAL ESTATES MOBILE HOME PARK LAUREL, DE · 165 people · Groundwater ANGOLA CREST II LEWES, DE · 159 people · Groundwater SHADY ACRES MOBILE HOME PARK LAUREL, DE · 152 people · Groundwater OAK GROVE ESTATES DOVER, DE · 150 people · Groundwater QUILLENS POINT OCEAN VIEW, DE · 150 people · Groundwater HEDGEROW HOLLOW NEW YORK, NY · 147 people · Groundwater PINE VALLEY MOBILE HOME PARK REHOBOTH BEACH, DE · 145 people · Groundwater SEA WINDS PUMP DISTRICT DOVER, DE · 141 people · Groundwater GRANADA MOBILE HOME COURT MAGNOLIA, DE · 138 people · Groundwater HOLIDAY ACRES, LLC REHOBOTH, DE · 132 people · Groundwater FISHERMANS VILLAGE (TUI) DOVER, DE · 129 people · Groundwater PONDS OF WILLOW GROVE DOVER, DE · 126 people · Groundwater